题目内容

--Mike, can you tell us something about our new teacher?
-- Oh, sorry. I know nothing because I _____________ him before.
A．sawB．didn’t seeC．have seenD．haven’t seen
D

试题分析：句意：迈克你能告诉我一些有关我们新老师的事情吗？对不起，我什么都不知道。我以前没有见过他。根据句意，可知我不知道是对现在的影响，动作发生在过去强调对现在的影响，用现在完成时，故选D。
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